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New power supply for crossfire? - Help

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January 9, 2013 9:55:24 PM

Hello,
I currently have a VTX HD 6870 radeon and want to purchase another one in order to crossfire the two Gpus,
I have a Corsair cx500 (500w). Do i require more watts for crossfire and if so how much? The other problem is that each VTX HD 6870 radeon requires two 6pins and therefore i would need a Psu with 4x 6pins to fully connect both Gpus. Can anyone recomend me a good psu with enough watts as well as 4x 6pins?

Thanks,
Eggy :) 

More about : power supply crossfire

a c 291 ) Power supply
January 9, 2013 11:30:17 PM

EggyDevil said:
Hello,
I currently have a VTX HD 6870 radeon and want to purchase another one in order to crossfire the two Gpus,
I have a Corsair cx500 (500w). Do i require more watts for crossfire and if so how much? The other problem is that each VTX HD 6870 radeon requires two 6pins and therefore i would need a Psu with 4x 6pins to fully connect both Gpus. Can anyone recomend me a good psu with enough watts as well as 4x 6pins?

Thanks,
Eggy :) 



Hi - Yes you need a PSU with 4 pci-e connectors. But, need to know your
budget $$ for the PSU to recommend.

Tom
a c 150 ) Power supply
January 9, 2013 11:36:50 PM

Here is a solid choice that will work well for you: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

You should look for 750W on up if you plan on running 2 HD 6870s in Xfire. Each card will draw 12.6 amps from the +12V rail(s) when maxed out. The processor is also a major current user from the +12V rail(s). Which CPU are you using?
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a b ) Power supply
January 9, 2013 11:48:09 PM

A good 650W will do but as mentioned, need your budget input. Very good ones can be had between $80 and $120.

a c 291 ) Power supply
January 9, 2013 11:49:41 PM

EggyDevil said:
Hello,
I currently have a VTX HD 6870 radeon and want to purchase another one in order to crossfire the two Gpus,
I have a Corsair cx500 (500w). Do i require more watts for crossfire and if so how much? The other problem is that each VTX HD 6870 radeon requires two 6pins and therefore i would need a Psu with 4x 6pins to fully connect both Gpus. Can anyone recomend me a good psu with enough watts as well as 4x 6pins?

Thanks,
Eggy :) 


Hi again - realhardtechX suggests 600w(no harm in more) for 2 6870's in CF,

here's some 650w units to consider:

http://www.newegg.com/Product/Product.aspx?Item=N82E168... nets to $80

http://www.newegg.com/Product/Product.aspx?Item=N82E168... nets to $110

http://www.newegg.com/Product/Product.aspx?Item=N82E168... nets to $96

January 10, 2013 2:02:29 AM

clutchc said:
Here is a solid choice that will work well for you: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

You should look for 750W on up if you plan on running 2 HD 6870s in Xfire. Each card will draw 12.6 amps from the +12V rail(s) when maxed out. The processor is also a major current user from the +12V rail(s). Which CPU are you using?


my pc currently has a i7 2600k
January 10, 2013 2:03:21 AM

redtailed said:
A good 650W will do but as mentioned, need your budget input. Very good ones can be had between $80 and $120.


yes my max budget is 120$
January 10, 2013 2:04:07 AM

thanks a lot guys, really helped :) )
!